There's several situations where the same random seed is needed in multicomputer setups, this being one such case. Perhaps there should be a central "session seed" value shared across same session machines, perhaps with the option to specifically indicate one of the machines as master? For stuff like multiplayer with consistent randomly generated cloud cover or ground clutter?


> Date: Mon, 30 Jul 2012 22:49:52 +0100
> From:
> To:
> Subject: Re: [Flightgear-devel] CAVOK METAR interpretation
> On Mon, Jul 30, 2012 at 9:49 PM, Torsten Dreyer wrote:
> >> I'd like to change our CAVOK definitions to no cloud and 15km
> >> visibility. That way those of us using real weather fetch as a matter
> >> of course might occasionally get gin clear skies without a cloud in
> >> the sky. Unlike the UK summer this year...
> >>
> >> Any objections?
> >
> > No objections but an idea: how about adding a little randomness to the
> > cloud cover and visibility?
> Good idea, but I'm not surely exactly how to go about it while retaining
> some element of determinism. I'm worried about multi-computer systems,
> or two users at the same airport in the MP environment. It would be nice
> if they have as similar an environment from the same METAR as possible.
> One option might be to use a seed based on the METAR timestamp, but
> that makes this time-dependant.
> An alternative might be to use the airport code in the METAR, but then we'll
> get some airports that never get really clear CAVOK conditions.
> -Stuart
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